11000050561 has 2 divisors, whose sum is σ = 11000050562. Its totient is φ = 11000050560.

The previous prime is 11000050543. The next prime is 11000050573. The reversal of 11000050561 is 16505000011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5573518336 + 5426532225 = 74656^2 + 73665^2 .

It is a cyclic number.

It is not a de Polignac number, because 11000050561 - 2¹³ = 11000042369 is a prime.

It is a super-2 number, since 2×11000050561² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11000050591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5500025280 + 5500025281.

It is an arithmetic number, because the mean of its divisors is an integer number (5500025281).

Almost surely, 2^11000050561 is an apocalyptic number.

It is an amenable number.

11000050561 is a deficient number, since it is larger than the sum of its proper divisors (1).

11000050561 is an equidigital number, since it uses as much as digits as its factorization.

11000050561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 150, while the sum is 19.

Adding to 11000050561 its reverse (16505000011), we get a palindrome (27505050572).

The spelling of 11000050561 in words is "eleven billion, fifty thousand, five hundred sixty-one".